A former White Bear Lake police officer has pleaded guilty in Washington County District Court to one count of stalking.

Susan Tuthill, 46, was charged in January with two counts of felony stalking for allegedly sending threatening letters and text messages to a former boyfriend and his new love interest.

According to a criminal complaint, Tuthill called Cottage Grove police last summer to report three vandalism incidents, including slashed tires on her car, which she said she believed were related to harassing text messages she had received.

Cottage Grove investigators were suspicious of Tuthill's story and she soon became the center of the investigation, according to court documents.

Investigators said more than 80 of the harassing communications to the ex-boyfriend and his girlfriend were traced to purchases on Tuthill's credit card from a "spoofing" website that allows users to send anonymous messages that will appear to be sent from other parts of the world, according to court documents.

It was the second time Tuthill had been accused of harassing an ex-boyfriend. The first incident led to her 2009 firing from the White Bear Lake police department, after nearly a decade on the force.

Tuthill pleaded guilty July 31 to one of the two Washington County charges. The other likely will be dismissed as part of a plea agreement. A sentencing hearing is scheduled for Nov. 10.